Microstructure and Mechanical Properties After Shock Wave Loading of Cast CrMnNi TRIP Steel

Eckner, Ralf; Krüger, Lutz; Ullrich, C.; Rafaja, David; Schlothauer, T.; Heide, G.

doi:10.1007/s11661-016-3688-z

Cited by 8 publications

(2 citation statements)

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“…5). With increasing shock pressure, the number and thickness of the deformation bands appeared to increase [28]. The bands evolved in two different orientations, but hardly any α'-martensite could be found at their intersections.…”

Section: (Gpa)mentioning

confidence: 95%

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Deformation mechanisms and microplasticity of austenitic TRIP/TWIP steel under flyer plate impact

et al. 2018

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Abstract. The focus of this study is on the deformation mechanisms of high-alloy cast austenitic TRIP/TWIP steel with the nominal composition Fe-16Cr-6Mn-6Ni. Due to its chemical composition, the material exhibits a low stacking-fault energy of 17.5 mJ/m2 which facilitates the formation of the deformation-induced γ (fcc) → ε (hep) → α’ (bcc) transformation. Consequently, the steel exhibits a tensile strength of 800 MPa with fracture elongation of 55 % under quasi-static loading. The experiments presented demonstrate the response of this steel to flyer-plate impact (FPI) at room temperature using two different test setups. In the first setup, laser interferometry measurements of the sample free surface were used for determination of the dynamic mechanical properties (Hugoniot elastic limit / HEL. spall strength) after impact with aluminium plates accelerated up to 650 m/s. In the second setup, an experimental shock testing device developed at the Freiberg High-Pressure Research Centre was used for impacting large cylindrical samples without the occurrence of spallation. Subsequently, microstructural investigations were carried out by scanning electron microscopy (SEM) and transmission election microscopy (TEM) in combination with diffraction techniques and magnetic martensite measurements. Their results facilitate the representation of a complete image of deformation mechanisms during shock wave loading.

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Section: (Gpa)mentioning

confidence: 95%

“…6, found bcc and hcp phases within the deformation bands, which confirmed the presence of εand α'-martensite. Hence, the ε-martensite acted as an intermediate phase from which α'-martensite arose, according to the transformation sequence γ → ε → α' [23,26,[28][29][30][31]. Fig.…”

Section: (Gpa)mentioning

confidence: 99%